cpu 缓存：
getconf -a


LEVEL1_ICACHE_SIZE

LEVEL1_ICACHE_ASSOC

LEVEL1_ICACHE_LINESIZE

LEVEL1_DCACHE_SIZE

LEVEL1_DCACHE_ASSOC

LEVEL1_DCACHE_LINESIZE 64

LEVEL2_CACHE_SIZE

LEVEL2_CACHE_ASSOC

LEVEL2_CACHE_LINESIZE 64

LEVEL3_CACHE_SIZE

LEVEL3_CACHE_ASSOC

LEVEL3_CACHE_LINESIZE 64

LEVEL4_CACHE_SIZE

LEVEL4_CACHE_ASSOC

LEVEL4_CACHE_LINESIZE